Dual line bowstring server

ABSTRACT

A bowstring server includes a frame having two generally Ushaped spool support sections arranged generally at right angles to one another with each spool support section having opposed side arms with opposed bearings for rotatably supporting a spool of line in such a way as to provide substantially constant tension on the spools as they pay out the line. The side arms are flexible and deformable to new positions in spaced relation to one another to change the spool tension. A serving head portion of the frame, through which the line from the spools passes to wrap around core strands is located at approximately the center of gravity of the frame and spool assembly and has a notched shape to receive the core strands whereby upon the rotation of the assembly about the core strands two continuous wraps arranged side by side are formed on the core strands.

United tates Patent Hazelwood May 13, 1975 DUAL LINE BOWSTRING SERVER Primary ExaminerBilly S. Taylor [76] Inventor: Loren Richard Hazelwood, 544 s. g g Agem crande Xavier, Denver, Colo. 80219 O um us [22] Filed: Aug. 7, 1972 [57] ABSTRACT [21] A N 278,550 A bowstring server includes a frame having two generally U-shaped spool support sections arranged generally at right angles to one another with each spool sup- [52] US. Cl. 57/10, 57/13,62428/Z.(1)2 port Section having opposed Side arms with opposed B bearings for rotatably pp i g a Spool of line in [58] Field of Search 242/7'l9 '9 such a way as to provide substantially constant tension 242/96 SW10 3 on the spools as they pay out the line. The side arms are flexible and deformable to new positions in spaced [56] References C'ted relation to one another to change the spool tension. A UNITED STATES PATENTS serving head portion of the frame, through which the 1 11,160 1/1871 Westcott 57/10 line from the spools passes to wrap around core 1,127,551 2/1915 Vincent .4 57/l0 strands is located at approximately the center of gravl,277,553 9/l9l8 Crandall 242/l29.51 of thg frame and spooLassembly and has a notched 2,031,501 2/1936 Porter 242/99 shape to recive the Core Strands whereby upon the Harvey 5/ 6 rotation of the assembly about the core strands two 217381631 751957 Beverini.....................:::: i 12/140 X Continuous Wraps arranged Side by Side are fmmed the core strands.

8 Claims, 4 Drawing Figures aaezassz PATEN'B'ED MAY 2 3197s DUAL LINE BOWSTRING SERVER BACKGROUND OF THE INVENTION This invention relates generally to serving devices and more particularly to a novel and improved dual line server for serving bowstrings and the like.

Archers frequenctly make their own bowstrings using a server which serves a line or thread on core strands. One server commonly in use has a generally U-shaped frame with opposed side arms between which a supported a spool of line with the line paying out through a serving head portion in the form of an aperture in a portion of the frame upon the rotation of the assembly about the core strands. In this form the spool of line is mounted for rotation on a bolt with washers at each end and a nut is threaded in the end thereof. Among the disadvantages of this prior art form of server is that there is no way to satisfactorily adjust the tension on the line during pay-out and the tension may vary if the nut becomes tighter or loosens as the spool is rotated. Without the proper tension on the spool, the server tends to pull away from the bowstring while the serving is being carried out or not rotate freely. Another disadvantage of this prior art form resides in the fact that the server is an unbalanced weight about the serving point so that the server moves irregularly during serving and does not readily spin about the core strands, Moreover, such prior known bowstring serving devices are gener ally adapted for serving a single line.

Accordingly, it is an object of this invention to provide a novel dual line bowstring server which maintains a substantially constant or uniform selected amount of tension on each serving spool.

Another object of this invention is to provide a novel bowstring server wherein a serving head portion adapted for engaging the bowstring is approximately at the center of gravity of the server whereby upon its rotation about the core strands, it remains in contact with the strands and will spin through a plurality of rotations in a balanced rotary manner about the strands.

Still a further object of this invention is to provide a novel bowstring server in which more than one line is served simultaneously during each revolution thereof around the core strands.

Yet another object of this invention is to provide a novel dual line bowstring server generally characterized by having a frame with two spool support sections arranged generally at right angles to one another each having flexible, deformable, opposed arms with bearing means supporting the associated spool of line for rotation under a relatively constant, uniform tension, the tension being adjustable by deforming the opposed arms and bearings relative to the ends of the spools.

SUMMARY OF THE INVENTION In accordance with the present invention in a preferred form shown there is provided a frame constructed of an elongated strip of flexible, deformable metal. The frame includes a pair of generally U-shaped sections each having a pair of opposed support arms with a longitudinal axis thereof disposed at substantially right angles to one another. An intermediate portion of the frame is shaped to form a notched serving head portion including a discharge aperture for the wrap lines located at a juncture of the free ends of opposed adjacent support arms and also has an intermediate section connecting the opposed free ends of the other support arms of the U-shaped section. An inwardly extending tab portion on the intermediate section has an aperture to form a guide for the line between the two spools. Opposed bearings on each of the support arms support a spool of line for rotation. The tension is adjustable by moving the opposed support arms toward or away from one another but once set at a particular position, a substantially uniform tension is applied to the spools. The center of gravity of the frame and spools lies along a line extending between the tab portion and discharge aperture whereby there is provided a substantially balanced rotation of the assembly about the core strands.

Other objects, advantages and capabilities of the present invention will become apparent as the description proceeds taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a bowstring server made in accordance with the present invention and shown in an operative relation to the core strands of a bowstring being formed;

FIG. 2 is a plan view of the server shown in FIG. 1;

FIG. 3 is a longitudinal sectional view taken through the axis of one of the spools of thread;

FIG. 4 is a fragmentary sectional view along the tab portion for guiding two wrap lines from the spools;

Referring now to the drawings, the bowstring server shown in FIGS. 1 and 2 is forming a bowstring generally designated B comprised of a plurality of longitudinally extending core strands S suitably supported at the ends and upon which two wrap lines T1 and T2 are simultaneously being served or wrapped side by side as the server is spun or rotated around the longitudinal strands.

In general, the server shown comprises a spool support frame generally designated by numeral 12, supporting for rotation two spools 13 and 14 wrapped with lines T1 and T2, respectively. The spool support frame 12 comprises two similar generally U-shaped spool support sections 15 and 16 on which there is carried the spools 13 and 14, respectively. Each spool support section is of a corresponding size and shape and specifically with reference to spool support section 16 each comprises a pair of opposed spaced apart side arms .designated 16a and 16b and a generally V-shaped end portion designated 16c connecting the outer ends of the opposed side arms 16a and 16b. The free ends of the adjacent inner arms of the two U-shaped sections 15 and 16 extend at right angles to one another and are joined together at a common juncture 18 with a central discharge aperture 19 formed therein for the lines to form a serving head through which both of the wrap lines T1 and T2 pass. While a single aperture 19 is shown it is understood that a separate aperture for each wrap line may be provided at juncture 18. The frame also has a linearly extending outer side section 20 connecting the remaining free ends of the outer side arms of the U-shaped sections.

In the preferred embodiment shown, the frame 12 is constructed of a single strip of flexible, deformable metal about one inch wide bent to the configuration shown with the end portions of the strip extending inwardly and normal to the outer side section 20 to form a tab portion 21 provided with an aperture 22 for each wrap line. The tab portion 21 with apertures 22 form a line guide means to direct the line away from both spools. The overlapping portions of the strip are con- 3 nected by rivets 23 or a tack weld or the like toform a unitary frame.

The side arms of each U-shaped section of the frame.

spherical shaped bearing face and are suitably fastened along a flat outer face thereof to the inner face ofthe frame as with a rivet 27 which is fixedly secured to the bearing and extends through an aperture inthe frame.

and has a flattened head 27a on the outer side thereof. Each spool has a throughbore and each end thereof fits over the adjacent bearing surface providing a generally circular area of contact surface between a spool and bearing member. The tension on each spool is adjusted either by moving the arms of the frame inwardly to tighten the tension on the associated spool or spreading them apart to reduce the tension on the associated spool. In any event once the arms are positioned at a selected setting the tension remains substantially constant as the spool unwinds and pays out the line.

The frame spools l3 and 14 are arranged such that the serving head portion or .more specifically the discharge aperture 19 is located at or near the center of gravity of the entire frame and spool assembly. As shown in FIG. 2, line A-A passes through the center of gravity'of the assembly and line B-B passes through the discharge aperture 19 so that the aperture 19 is located very near the center of gravity of the assembly and is preferably slightly inside or inwardly oftthe discharge aperture 19. Moreover, the center of gravity of the frame and spool assembly is located along a line extending between the tab portion 21 and the discharge aperture 19 and is disposed adjacent and inwardly of the frame.

Referring again to FIG. 1, in a full sequence of opera tion for the above described server the opposed friction bearings are positioned a selected distance apart to provide the desired amount of tension on the associated spool. The line is threaded through the guide aperture 19 and discharge aperture21 and is intertwined with the core strands S with the serving head portion in engagement with the core strands. The entire assembly is then spun or rotated around the strands causing the spools to unwind simultaneously as it advances along the core strands whereby two threads T1 and T2 are simultaneously wrapped side by side on the core strands S to form the bowstring B.

Although the present invention has been described with a certain degree of particularity, it is understood.

that the present disclosure has been made by way of example and that changes in detailsof structure may be:

i. the longitudinal axis thereof intersecting generally at right angles,

ii. each section having a pair ofopposedside arms connected by an end portion and having free ends opposite said end portions iii. opposed bearing meanson the inner surfaces j J I 'of said side arms, each set of bearing means being adapted toreceive and support for rotation therebetween one of said spools.

iv. the free ends of the adjacent side arms of each. I

U-shaped sectionbeing joined together ata. juncture havinga discharge aperture defining a serving head portion through which the lines pass as they unwind from the spools.

ban outer side section connecting the free ends of r the remaining side arms of said U-shaped sections, said outer side section having an'inwardly extending tab portion with an aperture for each? I line to form a guide between said spools.

strands forming the core of the bowstring to simultaneously form two wraps of lineon thecore strands arranged side by side. I

2.,A bowstring server as set forth in claim I wherein 5 said material making up the frame is a flexiblesheet 1 metal.

3. A bowstring server as set forth in claim 1 wherein said bearing means isin the form of a member fastened, I j to the sidearm having an inwardly facing generally convex bearing surface adapted to extend slightly into the throughbore of the spool to bear generally; uniformly against the spool throughout its circumferential extent at the periphery of the end of the throughbore.

4. A bowstring server as set forth in claim 3 wherein. feach bearing surface oftsaid bearing member is ally semi-sphericalin shape.

5. In .abowstring server for simultaneously serving line from two spools about core strands, a framenfor the spools having:

a. a pair of spool support sections arranged in an. an-

gularly disposed relation facing one another, each said spool support section having bearing means. for supporting the spools for rotation about axes substantially perpendicular to each other at a substantially uniform tension during payout of the line from the spool,

b. line guide means to direct the line away from the spools during payout, and j c. a serving head with a discharge aperture located. between said spool support sections at substantially the center of gravity of the frame with the: spools inplace thereon and through which the lines pass f whereby the frame and spools will rotate about the strands to simultaneously form two wraps arranged side by side on the core strands. 6. A bowstring server comprising: A. two spools of line, j

B; support frame for said spools having a. a pair of generally U-shaped spool supportsections arranged in an angularly disposed relation to one anotherand connected together with the open ends facing one another, said frame sections being constructed fromtan. integral elon.-,

gated strip of flexible. deformable material shaped toprovide a pair of opposed side arms j and an end portion joining the outer ,ends I 7 thereof, the free ends of adjacent arms of each U=shaped section beingjoined together at a june= ture with a serving head portion and at an inter= mediate side section wherein the free ends of the remaining support arms of said Uashaped sections are connected,

b. opposed bearing means on each spool support section adapted to support for rotation one of said spools with a substantial uniform tension during payout of the line.

the line away from the spools. and

d. a serving head disposed between said spools through which the lines pass to wrap about a plu= rality of core strands. said serving head being located substantially at the center of gravity of the frame and spool assembly whereby the assembly will rotate about the core strands to simultaneously form two wraps arranged sidc-by-side thereon.

c. line guide means between said spools to direct n the line from the spools. and d. a serving head disposed between said spools 8. A Bowstring Server comprising: A. two spools of line. B. support frame for said spools having through which the lines pass to wrap about a plurality of core strands, said serving head being located substantially at the center of gravity of the frame and spool assembly whereby the assembly will rotate about the core strands to simultaneously form two wraps arranged side-by-side thereon.

a. a pair of generally U-shaped spool support sections arranged in an angularly disposed relation to one another and connected together with the open ends facing one another, said U-shaped sections having opposed side arms which are flexible and deformable to different spacing between the side arms,

7. A bowstring server comprising: A. Two spools of line. B. support frame for said spools having b. opposed bearing means on each spool support section adapted to support for rotation one of said spools with a substantially uniform tension during payout of the line,

c. line guide means between said spools to direct the line away from the spools, and

d. a serving head disposed between said spools through which the lines pass to wrap about a plurality of core strands. said serving head being located substantially at the center of gravity of the frame and spool assembly whereby the assembly will rotate about the core strands to simultaneously form two wraps arranged side-by-side thereon.

a a a a 

1. A bowstring server comprising: A. two spools of line, B. a support frame for said spools constructed from a single elongated strip of flexible deformable material, said frame including; a. a pair of generally U-shaped spool support sections having, i. the longitudinal axis thereof intersecting generally at right angles, ii. each section having a pair of opposed side arms connected by an end portion and having free ends opposite said end portions iii. opposed bearing means on the inner surfaces of said side arms, each set of bearing means being adapted to receive and support for rotation therebetween one of said spools. iv. the free ends of the adjacent side arms of each U-shaped section being joined together at a juncture having a discharge aperture defining a serving head portion through which the lineS pass as they unwind from the spools. b. an outer side section connecting the free ends of the remaining side arms of said U-shaped sections, said outer side section having an inwardly extending tab portion with an aperture for each line to form a guide between said spools. c. the center of gravity of the frame and spool assembly lying along a line extending between said tab portion and said discharge aperture and being disposed adjacent said discharge aperture and inwardly of said frame whereby the frame and spool assembly will rotate about longitudinal strands forming the core of the bowstring to simultaneously form two wraps of line on the core strands arranged side by side.
 2. A bowstring server as set forth in claim 1 wherein said material making up the frame is a flexible sheet metal.
 3. A bowstring server as set forth in claim 1 wherein said bearing means is in the form of a member fastened to the side arm having an inwardly facing generally convex bearing surface adapted to extend slightly into the throughbore of the spool to bear generally uniformly against the spool throughout its circumferential extent at the periphery of the end of the throughbore.
 4. A bowstring server as set forth in claim 3 wherein each bearing surface of said bearing member is generally semi-spherical in shape.
 5. In a bowstring server for simultaneously serving line from two spools about core strands, a frame for the spools having: a. a pair of spool support sections arranged in an angularly disposed relation facing one another, each said spool support section having bearing means for supporting the spools for rotation about axes substantially perpendicular to each other at a substantially uniform tension during payout of the line from the spool, b. line guide means to direct the line away from the spools during payout, and c. a serving head with a discharge aperture located between said spool support sections at substantially the center of gravity of the frame with the spools in place thereon and through which the lines pass whereby the frame and spools will rotate about the strands to simultaneously form two wraps arranged side by side on the core strands.
 6. A bowstring server comprising: A. two spools of line, B. support frame for said spools having a. a pair of generally U-shaped spool support sections arranged in an angularly disposed relation to one another and connected together with the open ends facing one another, said frame sections being constructed from an integral elongated strip of flexible deformable material shaped to provide a pair of opposed side arms and an end portion joining the outer ends thereof, the free ends of adjacent arms of each U-shaped section being joined together at a juncture with a serving head portion and at an intermediate side section wherein the free ends of the remaining support arms of said U-shaped sections are connected, b. opposed bearing means on each spool support section adapted to support for rotation one of said spools with a substantial uniform tension during payout of the line, c. line guide means between said spools to direct the line from the spools, and d. a serving head disposed between said spools through which the lines pass to wrap about a plurality of core strands, said serving head being located substantially at the center of gravity of the frame and spool assembly whereby the assembly will rotate about the core strands to simultaneously form two wraps arranged side-by-side thereon.
 7. A bowstring server comprising: A. Two spools of line, B. support frame for said spools having a. a pair of generally U-shaped spool support sections arranged in an angularly disposed relation to one another and connected together with the open ends facing one another, b. opposed bearing means on each spool support section adapted to support for rotation about an axes, one of said spools with a substantially uniform tension during payout of the line, said axes of rotation of each spool support section being substantially perpendicular to the axes of rotation of the other spool support section, c. line guide means between said spools to direct the line away from the spools, and d. a serving head disposed between said spools through which the lines pass to wrap about a plurality of core strands, said serving head being located substantially at the center of gravity of the frame and spool assembly whereby the assembly will rotate about the core strands to simultaneously form two wraps arranged side-by-side thereon.
 8. A Bowstring Server comprising: A. two spools of line, B. support frame for said spools having a. a pair of generally U-shaped spool support sections arranged in an angularly disposed relation to one another and connected together with the open ends facing one another, said U-shaped sections having opposed side arms which are flexible and deformable to different spacing between the side arms, b. opposed bearing means on each spool support section adapted to support for rotation one of said spools with a substantially uniform tension during payout of the line, c. line guide means between said spools to direct the line away from the spools, and d. a serving head disposed between said spools through which the lines pass to wrap about a plurality of core strands, said serving head being located substantially at the center of gravity of the frame and spool assembly whereby the assembly will rotate about the core strands to simultaneously form two wraps arranged side-by-side thereon. 